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- Generic CPU0 cpufreq driver
- It is a generic cpufreq driver for CPU0 frequency management. It
- supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
- systems which share clock and voltage across all CPUs.
- Both required and optional properties listed below must be defined
- under node /cpus/cpu@0.
- Required properties:
- - operating-points: Refer to Documentation/devicetree/bindings/power/opp.txt
- for details
- Optional properties:
- - clock-latency: Specify the possible maximum transition latency for clock,
- in unit of nanoseconds.
- - voltage-tolerance: Specify the CPU voltage tolerance in percentage.
- Examples:
- cpus {
- #address-cells = <1>;
- #size-cells = <0>;
- cpu@0 {
- compatible = "arm,cortex-a9";
- reg = <0>;
- next-level-cache = <&L2>;
- operating-points = <
- /* kHz uV */
- 792000 1100000
- 396000 950000
- 198000 850000
- >;
- transition-latency = <61036>; /* two CLK32 periods */
- };
- cpu@1 {
- compatible = "arm,cortex-a9";
- reg = <1>;
- next-level-cache = <&L2>;
- };
- cpu@2 {
- compatible = "arm,cortex-a9";
- reg = <2>;
- next-level-cache = <&L2>;
- };
- cpu@3 {
- compatible = "arm,cortex-a9";
- reg = <3>;
- next-level-cache = <&L2>;
- };
- };
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